Initial revision

1 files changed, 2981 insertions, 0 deletions

diff --git a/lib/command.c b/lib/command.c
new file mode 100644
index 00000000..8cbecce1
--- /dev/null
+++ b/lib/command.c
@@ -0,0 +1,2981 @@
+/* Command interpreter routine for virtual terminal [aka TeletYpe]
+   Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
+
+This file is part of GNU Zebra.
+ 
+GNU Zebra is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published
+by the Free Software Foundation; either version 2, or (at your
+option) any later version.
+
+GNU Zebra is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Zebra; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <zebra.h>
+
+#include "command.h"
+#include "memory.h"
+#include "log.h"
+#include "version.h"
+
+/* Command vector which includes some level of command lists. Normally
+   each daemon maintains each own cmdvec. */
+vector cmdvec;
+
+/* Host information structure. */
+struct host host;
+
+/* Default motd string. */
+char *default_motd = 
+"\r\n\
+Hello, this is zebra (version " ZEBRA_VERSION ").\r\n\
+Copyright 1996-2002 Kunihiro Ishiguro.\r\n\
+\r\n";
+
+/* Standard command node structures. */
+struct cmd_node auth_node =
+{
+  AUTH_NODE,
+  "Password: ",
+};
+
+struct cmd_node view_node =
+{
+  VIEW_NODE,
+  "%s> ",
+};
+
+struct cmd_node auth_enable_node =
+{
+  AUTH_ENABLE_NODE,
+  "Password: ",
+};
+
+struct cmd_node enable_node =
+{
+  ENABLE_NODE,
+  "%s# ",
+};
+
+struct cmd_node config_node =
+{
+  CONFIG_NODE,
+  "%s(config)# ",
+  1
+};
+
+/* Utility function to concatenate argv argument into a single string
+   with inserting ' ' character between each argument.  */
+char *
+argv_concat (char **argv, int argc, int shift)
+{
+  int i;
+  int len;
+  int index;
+  char *str;
+
+  str = NULL;
+  index = 0;
+
+  for (i = shift; i < argc; i++)
+    {
+      len = strlen (argv[i]);
+
+      if (i == shift)
+	{
+	  str = XSTRDUP (MTYPE_TMP, argv[i]);
+	  index = len;
+	}
+      else
+	{
+	  str = XREALLOC (MTYPE_TMP, str, (index + len + 2));
+	  str[index++] = ' ';
+	  memcpy (str + index, argv[i], len);
+	  index += len;
+	  str[index] = '\0';
+	}
+    }
+  return str;
+}
+
+/* Install top node of command vector. */
+void
+install_node (struct cmd_node *node, 
+	      int (*func) (struct vty *))
+{
+  vector_set_index (cmdvec, node->node, node);
+  node->func = func;
+  node->cmd_vector = vector_init (VECTOR_MIN_SIZE);
+}
+
+/* Compare two command's string.  Used in sort_node (). */
+int
+cmp_node (const void *p, const void *q)
+{
+  struct cmd_element *a = *(struct cmd_element **)p;
+  struct cmd_element *b = *(struct cmd_element **)q;
+
+  return strcmp (a->string, b->string);
+}
+
+int
+cmp_desc (const void *p, const void *q)
+{
+  struct desc *a = *(struct desc **)p;
+  struct desc *b = *(struct desc **)q;
+
+  return strcmp (a->cmd, b->cmd);
+}
+
+/* Sort each node's command element according to command string. */
+void
+sort_node ()
+{
+  int i, j;
+  struct cmd_node *cnode;
+  vector descvec;
+  struct cmd_element *cmd_element;
+
+  for (i = 0; i < vector_max (cmdvec); i++) 
+    if ((cnode = vector_slot (cmdvec, i)) != NULL)
+      {	
+	vector cmd_vector = cnode->cmd_vector;
+	qsort (cmd_vector->index, cmd_vector->max, sizeof (void *), cmp_node);
+
+	for (j = 0; j < vector_max (cmd_vector); j++)
+	  if ((cmd_element = vector_slot (cmd_vector, j)) != NULL)
+	    {
+	      descvec = vector_slot (cmd_element->strvec,
+				     vector_max (cmd_element->strvec) - 1);
+	      qsort (descvec->index, descvec->max, sizeof (void *), cmp_desc);
+	    }
+      }
+}
+
+/* Breaking up string into each command piece. I assume given
+   character is separated by a space character. Return value is a
+   vector which includes char ** data element. */
+vector
+cmd_make_strvec (char *string)
+{
+  char *cp, *start, *token;
+  int strlen;
+  vector strvec;
+  
+  if (string == NULL)
+    return NULL;
+  
+  cp = string;
+
+  /* Skip white spaces. */
+  while (isspace ((int) *cp) && *cp != '\0')
+    cp++;
+
+  /* Return if there is only white spaces */
+  if (*cp == '\0')
+    return NULL;
+
+  if (*cp == '!' || *cp == '#')
+    return NULL;
+
+  /* Prepare return vector. */
+  strvec = vector_init (VECTOR_MIN_SIZE);
+
+  /* Copy each command piece and set into vector. */
+  while (1) 
+    {
+      start = cp;
+      while (!(isspace ((int) *cp) || *cp == '\r' || *cp == '\n') &&
+	     *cp != '\0')
+	cp++;
+      strlen = cp - start;
+      token = XMALLOC (MTYPE_STRVEC, strlen + 1);
+      memcpy (token, start, strlen);
+      *(token + strlen) = '\0';
+      vector_set (strvec, token);
+
+      while ((isspace ((int) *cp) || *cp == '\n' || *cp == '\r') &&
+	     *cp != '\0')
+	cp++;
+
+      if (*cp == '\0')
+	return strvec;
+    }
+}
+
+/* Free allocated string vector. */
+void
+cmd_free_strvec (vector v)
+{
+  int i;
+  char *cp;
+
+  if (!v)
+    return;
+
+  for (i = 0; i < vector_max (v); i++)
+    if ((cp = vector_slot (v, i)) != NULL)
+      XFREE (MTYPE_STRVEC, cp);
+
+  vector_free (v);
+}
+
+/* Fetch next description.  Used in cmd_make_descvec(). */
+char *
+cmd_desc_str (char **string)
+{
+  char *cp, *start, *token;
+  int strlen;
+  
+  cp = *string;
+
+  if (cp == NULL)
+    return NULL;
+
+  /* Skip white spaces. */
+  while (isspace ((int) *cp) && *cp != '\0')
+    cp++;
+
+  /* Return if there is only white spaces */
+  if (*cp == '\0')
+    return NULL;
+
+  start = cp;
+
+  while (!(*cp == '\r' || *cp == '\n') && *cp != '\0')
+    cp++;
+
+  strlen = cp - start;
+  token = XMALLOC (MTYPE_STRVEC, strlen + 1);
+  memcpy (token, start, strlen);
+  *(token + strlen) = '\0';
+
+  *string = cp;
+
+  return token;
+}
+
+/* New string vector. */
+vector
+cmd_make_descvec (char *string, char *descstr)
+{
+  int multiple = 0;
+  char *sp;
+  char *token;
+  int len;
+  char *cp;
+  char *dp;
+  vector allvec;
+  vector strvec = NULL;
+  struct desc *desc;
+
+  cp = string;
+  dp = descstr;
+
+  if (cp == NULL)
+    return NULL;
+
+  allvec = vector_init (VECTOR_MIN_SIZE);
+
+  while (1)
+    {
+      while (isspace ((int) *cp) && *cp != '\0')
+	cp++;
+
+      if (*cp == '(')
+	{
+	  multiple = 1;
+	  cp++;
+	}
+      if (*cp == ')')
+	{
+	  multiple = 0;
+	  cp++;
+	}
+      if (*cp == '|')
+	{
+	  if (! multiple)
+	    {
+	      fprintf (stderr, "Command parse error!: %s\n", string);
+	      exit (1);
+	    }
+	  cp++;
+	}
+      
+      while (isspace ((int) *cp) && *cp != '\0')
+	cp++;
+
+      if (*cp == '(')
+	{
+	  multiple = 1;
+	  cp++;
+	}
+
+      if (*cp == '\0') 
+	return allvec;
+
+      sp = cp;
+
+      while (! (isspace ((int) *cp) || *cp == '\r' || *cp == '\n' || *cp == ')' || *cp == '|') && *cp != '\0')
+	cp++;
+
+      len = cp - sp;
+
+      token = XMALLOC (MTYPE_STRVEC, len + 1);
+      memcpy (token, sp, len);
+      *(token + len) = '\0';
+
+      desc = XCALLOC (MTYPE_DESC, sizeof (struct desc));
+      desc->cmd = token;
+      desc->str = cmd_desc_str (&dp);
+
+      if (multiple)
+	{
+	  if (multiple == 1)
+	    {
+	      strvec = vector_init (VECTOR_MIN_SIZE);
+	      vector_set (allvec, strvec);
+	    }
+	  multiple++;
+	}
+      else
+	{
+	  strvec = vector_init (VECTOR_MIN_SIZE);
+	  vector_set (allvec, strvec);
+	}
+      vector_set (strvec, desc);
+    }
+}
+
+/* Count mandantory string vector size.  This is to determine inputed
+   command has enough command length. */
+int
+cmd_cmdsize (vector strvec)
+{
+  int i;
+  char *str;
+  int size = 0;
+  vector descvec;
+
+  for (i = 0; i < vector_max (strvec); i++)
+    {
+      descvec = vector_slot (strvec, i);
+
+      if (vector_max (descvec) == 1)
+	{
+	  struct desc *desc = vector_slot (descvec, 0);
+
+	  str = desc->cmd;
+	  
+	  if (str == NULL || CMD_OPTION (str))
+	    return size;
+	  else
+	    size++;
+	}
+      else
+	size++;
+    }
+  return size;
+}
+
+/* Return prompt character of specified node. */
+char *
+cmd_prompt (enum node_type node)
+{
+  struct cmd_node *cnode;
+
+  cnode = vector_slot (cmdvec, node);
+  return cnode->prompt;
+}
+
+/* Install a command into a node. */
+void
+install_element (enum node_type ntype, struct cmd_element *cmd)
+{
+  struct cmd_node *cnode;
+
+  cnode = vector_slot (cmdvec, ntype);
+
+  if (cnode == NULL) 
+    {
+      fprintf (stderr, "Command node %d doesn't exist, please check it\n",
+	       ntype);
+      exit (1);
+    }
+
+  vector_set (cnode->cmd_vector, cmd);
+
+  cmd->strvec = cmd_make_descvec (cmd->string, cmd->doc);
+  cmd->cmdsize = cmd_cmdsize (cmd->strvec);
+}
+
+static unsigned char itoa64[] =	
+"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+void
+to64(char *s, long v, int n)
+{
+  while (--n >= 0) 
+    {
+      *s++ = itoa64[v&0x3f];
+      v >>= 6;
+    }
+}
+
+char *zencrypt (char *passwd)
+{
+  char salt[6];
+  struct timeval tv;
+  char *crypt (const char *, const char *);
+
+  gettimeofday(&tv,0);
+  
+  to64(&salt[0], random(), 3);
+  to64(&salt[3], tv.tv_usec, 3);
+  salt[5] = '\0';
+
+  return crypt (passwd, salt);
+}
+
+/* This function write configuration of this host. */
+int
+config_write_host (struct vty *vty)
+{
+  if (host.name)
+    vty_out (vty, "hostname %s%s", host.name, VTY_NEWLINE);
+
+  if (host.encrypt)
+    {
+      if (host.password_encrypt)
+        vty_out (vty, "password 8 %s%s", host.password_encrypt, VTY_NEWLINE); 
+      if (host.enable_encrypt)
+        vty_out (vty, "enable password 8 %s%s", host.enable_encrypt, VTY_NEWLINE); 
+    }
+  else
+    {
+      if (host.password)
+        vty_out (vty, "password %s%s", host.password, VTY_NEWLINE);
+      if (host.enable)
+        vty_out (vty, "enable password %s%s", host.enable, VTY_NEWLINE);
+    }
+
+  if (host.logfile)
+    vty_out (vty, "log file %s%s", host.logfile, VTY_NEWLINE);
+
+  if (host.log_stdout)
+    vty_out (vty, "log stdout%s", VTY_NEWLINE);
+
+  if (host.log_syslog)
+    vty_out (vty, "log syslog%s", VTY_NEWLINE);
+
+  if (zlog_default->maskpri != LOG_DEBUG)
+    vty_out (vty, "log trap %s%s", zlog_priority[zlog_default->maskpri], VTY_NEWLINE);
+
+  if (zlog_default->record_priority == 1)
+    vty_out (vty, "log record-priority%s", VTY_NEWLINE);
+
+  if (host.advanced)
+    vty_out (vty, "service advanced-vty%s", VTY_NEWLINE);
+
+  if (host.encrypt)
+    vty_out (vty, "service password-encryption%s", VTY_NEWLINE);
+
+  if (host.lines >= 0)
+    vty_out (vty, "service terminal-length %d%s", host.lines,
+	     VTY_NEWLINE);
+
+  if (! host.motd)
+    vty_out (vty, "no banner motd%s", VTY_NEWLINE);
+
+  return 1;
+}
+
+/* Utility function for getting command vector. */
+vector
+cmd_node_vector (vector v, enum node_type ntype)
+{
+  struct cmd_node *cnode = vector_slot (v, ntype);
+  return cnode->cmd_vector;
+}
+
+/* Filter command vector by symbol */
+int
+cmd_filter_by_symbol (char *command, char *symbol)
+{
+  int i, lim;
+
+  if (strcmp (symbol, "IPV4_ADDRESS") == 0)
+    {
+      i = 0;
+      lim = strlen (command);
+      while (i < lim)
+	{
+	  if (! (isdigit ((int) command[i]) || command[i] == '.' || command[i] == '/'))
+	    return 1;
+	  i++;
+	}
+      return 0;
+    }
+  if (strcmp (symbol, "STRING") == 0)
+    {
+      i = 0;
+      lim = strlen (command);
+      while (i < lim)
+	{
+	  if (! (isalpha ((int) command[i]) || command[i] == '_' || command[i] == '-'))
+	    return 1;
+	  i++;
+	}
+      return 0;
+    }
+  if (strcmp (symbol, "IFNAME") == 0)
+    {
+      i = 0;
+      lim = strlen (command);
+      while (i < lim)
+	{
+	  if (! isalnum ((int) command[i]))
+	    return 1;
+	  i++;
+	}
+      return 0;
+    }
+  return 0;
+}
+
+/* Completion match types. */
+enum match_type 
+{
+  no_match,
+  extend_match,
+  ipv4_prefix_match,
+  ipv4_match,
+  ipv6_prefix_match,
+  ipv6_match,
+  range_match,
+  vararg_match,
+  partly_match,
+  exact_match 
+};
+
+enum match_type
+cmd_ipv4_match (char *str)
+{
+  char *sp;
+  int dots = 0, nums = 0;
+  char buf[4];
+
+  if (str == NULL)
+    return partly_match;
+
+  for (;;)
+    {
+      memset (buf, 0, sizeof (buf));
+      sp = str;
+      while (*str != '\0')
+	{
+	  if (*str == '.')
+	    {
+	      if (dots >= 3)
+		return no_match;
+
+	      if (*(str + 1) == '.')
+		return no_match;
+
+	      if (*(str + 1) == '\0')
+		return partly_match;
+
+	      dots++;
+	      break;
+	    }
+	  if (!isdigit ((int) *str))
+	    return no_match;
+
+	  str++;
+	}
+
+      if (str - sp > 3)
+	return no_match;
+
+      strncpy (buf, sp, str - sp);
+      if (atoi (buf) > 255)
+	return no_match;
+
+      nums++;
+
+      if (*str == '\0')
+	break;
+
+      str++;
+    }
+
+  if (nums < 4)
+    return partly_match;
+
+  return exact_match;
+}
+
+enum match_type
+cmd_ipv4_prefix_match (char *str)
+{
+  char *sp;
+  int dots = 0;
+  char buf[4];
+
+  if (str == NULL)
+    return partly_match;
+
+  for (;;)
+    {
+      memset (buf, 0, sizeof (buf));
+      sp = str;
+      while (*str != '\0' && *str != '/')
+	{
+	  if (*str == '.')
+	    {
+	      if (dots == 3)
+		return no_match;
+
+	      if (*(str + 1) == '.' || *(str + 1) == '/')
+		return no_match;
+
+	      if (*(str + 1) == '\0')
+		return partly_match;
+
+	      dots++;
+	      break;
+	    }
+
+	  if (!isdigit ((int) *str))
+	    return no_match;
+
+	  str++;
+	}
+
+      if (str - sp > 3)
+	return no_match;
+
+      strncpy (buf, sp, str - sp);
+      if (atoi (buf) > 255)
+	return no_match;
+
+      if (dots == 3)
+	{
+	  if (*str == '/')
+	    {
+	      if (*(str + 1) == '\0')
+		return partly_match;
+
+	      str++;
+	      break;
+	    }
+	  else if (*str == '\0')
+	    return partly_match;
+	}
+
+      if (*str == '\0')
+	return partly_match;
+
+      str++;
+    }
+
+  sp = str;
+  while (*str != '\0')
+    {
+      if (!isdigit ((int) *str))
+	return no_match;
+
+      str++;
+    }
+
+  if (atoi (sp) > 32)
+    return no_match;
+
+  return exact_match;
+}
+
+#define IPV6_ADDR_STR		"0123456789abcdefABCDEF:.%"
+#define IPV6_PREFIX_STR		"0123456789abcdefABCDEF:.%/"
+#define STATE_START		1
+#define STATE_COLON		2
+#define STATE_DOUBLE		3
+#define STATE_ADDR		4
+#define STATE_DOT               5
+#define STATE_SLASH		6
+#define STATE_MASK		7
+
+enum match_type
+cmd_ipv6_match (char *str)
+{
+  int state = STATE_START;
+  int colons = 0, nums = 0, double_colon = 0;
+  char *sp = NULL;
+
+  if (str == NULL)
+    return partly_match;
+
+  if (strspn (str, IPV6_ADDR_STR) != strlen (str))
+    return no_match;
+
+  while (*str != '\0')
+    {
+      switch (state)
+	{
+	case STATE_START:
+	  if (*str == ':')
+	    {
+	      if (*(str + 1) != ':' && *(str + 1) != '\0')
+		return no_match;
+     	      colons--;
+	      state = STATE_COLON;
+	    }
+	  else
+	    {
+	      sp = str;
+	      state = STATE_ADDR;
+	    }
+
+	  continue;
+	case STATE_COLON:
+	  colons++;
+	  if (*(str + 1) == ':')
+	    state = STATE_DOUBLE;
+	  else
+	    {
+	      sp = str + 1;
+	      state = STATE_ADDR;
+	    }
+	  break;
+	case STATE_DOUBLE:
+	  if (double_colon)
+	    return no_match;
+
+	  if (*(str + 1) == ':')
+	    return no_match;
+	  else
+	    {
+	      if (*(str + 1) != '\0')
+		colons++;
+	      sp = str + 1;
+	      state = STATE_ADDR;
+	    }
+
+	  double_colon++;
+	  nums++;
+	  break;
+	case STATE_ADDR:
+	  if (*(str + 1) == ':' || *(str + 1) == '\0')
+	    {
+	      if (str - sp > 3)
+		return no_match;
+
+	      nums++;
+	      state = STATE_COLON;
+	    }
+	  if (*(str + 1) == '.')
+	    state = STATE_DOT;
+	  break;
+	case STATE_DOT:
+	  state = STATE_ADDR;
+	  break;
+	default:
+	  break;
+	}
+
+      if (nums > 8)
+	return no_match;
+
+      if (colons > 7)
+	return no_match;
+
+      str++;
+    }
+
+#if 0
+  if (nums < 11)
+    return partly_match;
+#endif /* 0 */
+
+  return exact_match;
+}
+
+enum match_type
+cmd_ipv6_prefix_match (char *str)
+{
+  int state = STATE_START;
+  int colons = 0, nums = 0, double_colon = 0;
+  int mask;
+  char *sp = NULL;
+  char *endptr = NULL;
+
+  if (str == NULL)
+    return partly_match;
+
+  if (strspn (str, IPV6_PREFIX_STR) != strlen (str))
+    return no_match;
+
+  while (*str != '\0' && state != STATE_MASK)
+    {
+      switch (state)
+	{
+	case STATE_START:
+	  if (*str == ':')
+	    {
+	      if (*(str + 1) != ':' && *(str + 1) != '\0')
+		return no_match;
+	      colons--;
+	      state = STATE_COLON;
+	    }
+	  else
+	    {
+	      sp = str;
+	      state = STATE_ADDR;
+	    }
+
+	  continue;
+	case STATE_COLON:
+	  colons++;
+	  if (*(str + 1) == '/')
+	    return no_match;
+	  else if (*(str + 1) == ':')
+	    state = STATE_DOUBLE;
+	  else
+	    {
+	      sp = str + 1;
+	      state = STATE_ADDR;
+	    }
+	  break;
+	case STATE_DOUBLE:
+	  if (double_colon)
+	    return no_match;
+
+	  if (*(str + 1) == ':')
+	    return no_match;
+	  else
+	    {
+	      if (*(str + 1) != '\0' && *(str + 1) != '/')
+		colons++;
+	      sp = str + 1;
+
+	      if (*(str + 1) == '/')
+		state = STATE_SLASH;
+	      else
+		state = STATE_ADDR;
+	    }
+
+	  double_colon++;
+	  nums += 1;
+	  break;
+	case STATE_ADDR:
+	  if (*(str + 1) == ':' || *(str + 1) == '.'
+	      || *(str + 1) == '\0' || *(str + 1) == '/')
+	    {
+	      if (str - sp > 3)
+		return no_match;
+
+	      for (; sp <= str; sp++)
+		if (*sp == '/')
+		  return no_match;
+
+	      nums++;
+
+	      if (*(str + 1) == ':')
+		state = STATE_COLON;
+	      else if (*(str + 1) == '.')
+		state = STATE_DOT;
+	      else if (*(str + 1) == '/')
+		state = STATE_SLASH;
+	    }
+	  break;
+	case STATE_DOT:
+	  state = STATE_ADDR;
+	  break;
+	case STATE_SLASH:
+	  if (*(str + 1) == '\0')
+	    return partly_match;
+
+	  state = STATE_MASK;
+	  break;
+	default:
+	  break;
+	}
+
+      if (nums > 11)
+	return no_match;
+
+      if (colons > 7)
+	return no_match;
+
+      str++;
+    }
+
+  if (state < STATE_MASK)
+    return partly_match;
+
+  mask = strtol (str, &endptr, 10);
+  if (*endptr != '\0')
+    return no_match;
+
+  if (mask < 0 || mask > 128)
+    return no_match;
+  
+/* I don't know why mask < 13 makes command match partly.
+   Forgive me to make this comments. I Want to set static default route
+   because of lack of function to originate default in ospf6d; sorry
+       yasu
+  if (mask < 13)
+    return partly_match;
+*/
+
+  return exact_match;
+}
+
+#define DECIMAL_STRLEN_MAX 10
+
+int
+cmd_range_match (char *range, char *str)
+{
+  char *p;
+  char buf[DECIMAL_STRLEN_MAX + 1];
+  char *endptr = NULL;
+  unsigned long min, max, val;
+
+  if (str == NULL)
+    return 1;
+
+  val = strtoul (str, &endptr, 10);
+  if (*endptr != '\0')
+    return 0;
+
+  range++;
+  p = strchr (range, '-');
+  if (p == NULL)
+    return 0;
+  if (p - range > DECIMAL_STRLEN_MAX)
+    return 0;
+  strncpy (buf, range, p - range);
+  buf[p - range] = '\0';
+  min = strtoul (buf, &endptr, 10);
+  if (*endptr != '\0')
+    return 0;
+
+  range = p + 1;
+  p = strchr (range, '>');
+  if (p == NULL)
+    return 0;
+  if (p - range > DECIMAL_STRLEN_MAX)
+    return 0;
+  strncpy (buf, range, p - range);
+  buf[p - range] = '\0';
+  max = strtoul (buf, &endptr, 10);
+  if (*endptr != '\0')
+    return 0;
+
+  if (val < min || val > max)
+    return 0;
+
+  return 1;
+}
+
+/* Make completion match and return match type flag. */
+enum match_type
+cmd_filter_by_completion (char *command, vector v, int index)
+{
+  int i;
+  char *str;
+  struct cmd_element *cmd_element;
+  enum match_type match_type;
+  vector descvec;
+  struct desc *desc;
+  
+  match_type = no_match;
+
+  /* If command and cmd_element string does not match set NULL to vector */
+  for (i = 0; i < vector_max (v); i++) 
+    if ((cmd_element = vector_slot (v, i)) != NULL)
+      {
+	if (index >= vector_max (cmd_element->strvec))
+	  vector_slot (v, i) = NULL;
+	else
+	  {
+	    int j;
+	    int matched = 0;
+
+	    descvec = vector_slot (cmd_element->strvec, index);
+	    
+	    for (j = 0; j < vector_max (descvec); j++)
+	      {
+		desc = vector_slot (descvec, j);
+		str = desc->cmd;
+
+		if (CMD_VARARG (str))
+		  {
+		    if (match_type < vararg_match)
+		      match_type = vararg_match;
+		    matched++;
+		  }
+		else if (CMD_RANGE (str))
+		  {
+		    if (cmd_range_match (str, command))
+		      {
+			if (match_type < range_match)
+			  match_type = range_match;
+
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV6 (str))
+		  {
+		    if (cmd_ipv6_match (command))
+		      {
+			if (match_type < ipv6_match)
+			  match_type = ipv6_match;
+
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV6_PREFIX (str))
+		  {
+		    if (cmd_ipv6_prefix_match (command))
+		      {
+			if (match_type < ipv6_prefix_match)
+			  match_type = ipv6_prefix_match;
+
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV4 (str))
+		  {
+		    if (cmd_ipv4_match (command))
+		      {
+			if (match_type < ipv4_match)
+			  match_type = ipv4_match;
+
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV4_PREFIX (str))
+		  {
+		    if (cmd_ipv4_prefix_match (command))
+		      {
+			if (match_type < ipv4_prefix_match)
+			  match_type = ipv4_prefix_match;
+			matched++;
+		      }
+		  }
+		else
+		/* Check is this point's argument optional ? */
+		if (CMD_OPTION (str) || CMD_VARIABLE (str))
+		  {
+		    if (match_type < extend_match)
+		      match_type = extend_match;
+		    matched++;
+		  }
+		else if (strncmp (command, str, strlen (command)) == 0)
+		  {
+		    if (strcmp (command, str) == 0) 
+		      match_type = exact_match;
+		    else
+		      {
+			if (match_type < partly_match)
+			  match_type = partly_match;
+		      }
+		    matched++;
+		  }
+	      }
+	    if (! matched)
+	      vector_slot (v, i) = NULL;
+	  }
+      }
+  return match_type;
+}
+
+/* Filter vector by command character with index. */
+enum match_type
+cmd_filter_by_string (char *command, vector v, int index)
+{
+  int i;
+  char *str;
+  struct cmd_element *cmd_element;
+  enum match_type match_type;
+  vector descvec;
+  struct desc *desc;
+  
+  match_type = no_match;
+
+  /* If command and cmd_element string does not match set NULL to vector */
+  for (i = 0; i < vector_max (v); i++) 
+    if ((cmd_element = vector_slot (v, i)) != NULL)
+      {
+	/* If given index is bigger than max string vector of command,
+           set NULL*/
+	if (index >= vector_max (cmd_element->strvec))
+	  vector_slot (v, i) = NULL;
+	else 
+	  {
+	    int j;
+	    int matched = 0;
+
+	    descvec = vector_slot (cmd_element->strvec, index);
+
+	    for (j = 0; j < vector_max (descvec); j++)
+	      {
+		desc = vector_slot (descvec, j);
+		str = desc->cmd;
+
+		if (CMD_VARARG (str))
+		  {
+		    if (match_type < vararg_match)
+		      match_type = vararg_match;
+		    matched++;
+		  }
+		else if (CMD_RANGE (str))
+		  {
+		    if (cmd_range_match (str, command))
+		      {
+			if (match_type < range_match)
+			  match_type = range_match;
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV6 (str))
+		  {
+		    if (cmd_ipv6_match (command) == exact_match)
+		      {
+			if (match_type < ipv6_match)
+			  match_type = ipv6_match;
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV6_PREFIX (str))
+		  {
+		    if (cmd_ipv6_prefix_match (command) == exact_match)
+		      {
+			if (match_type < ipv6_prefix_match)
+			  match_type = ipv6_prefix_match;
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV4 (str))
+		  {
+		    if (cmd_ipv4_match (command) == exact_match)
+		      {
+			if (match_type < ipv4_match)
+			  match_type = ipv4_match;
+			matched++;
+		      }
+		  }
+		else if (CMD_IPV4_PREFIX (str))
+		  {
+		    if (cmd_ipv4_prefix_match (command) == exact_match)
+		      {
+			if (match_type < ipv4_prefix_match)
+			  match_type = ipv4_prefix_match;
+			matched++;
+		      }
+		  }
+		else if (CMD_OPTION (str) || CMD_VARIABLE (str))
+		  {
+		    if (match_type < extend_match)
+		      match_type = extend_match;
+		    matched++;
+		  }
+		else
+		  {		  
+		    if (strcmp (command, str) == 0)
+		      {
+			match_type = exact_match;
+			matched++;
+		      }
+		  }
+	      }
+	    if (! matched)
+	      vector_slot (v, i) = NULL;
+	  }
+      }
+  return match_type;
+}
+
+/* Check ambiguous match */
+int
+is_cmd_ambiguous (char *command, vector v, int index, enum match_type type)
+{
+  int i;
+  int j;
+  char *str = NULL;
+  struct cmd_element *cmd_element;
+  char *matched = NULL;
+  vector descvec;
+  struct desc *desc;
+  
+  for (i = 0; i < vector_max (v); i++) 
+    if ((cmd_element = vector_slot (v, i)) != NULL)
+      {
+	int match = 0;
+
+	descvec = vector_slot (cmd_element->strvec, index);
+
+	for (j = 0; j < vector_max (descvec); j++)
+	  {
+	    enum match_type ret;
+
+	    desc = vector_slot (descvec, j);
+	    str = desc->cmd;
+
+	    switch (type)
+	      {
+	      case exact_match:
+		if (! (CMD_OPTION (str) || CMD_VARIABLE (str))
+		    && strcmp (command, str) == 0)
+		  match++;
+		break;
+	      case partly_match:
+		if (! (CMD_OPTION (str) || CMD_VARIABLE (str))
+		    && strncmp (command, str, strlen (command)) == 0)
+		  {
+		    if (matched && strcmp (matched, str) != 0)
+		      return 1;	/* There is ambiguous match. */
+		    else
+		      matched = str;
+		    match++;
+		  }
+		break;
+	      case range_match:
+		if (cmd_range_match (str, command))
+		  {
+		    if (matched && strcmp (matched, str) != 0)
+		      return 1;
+		    else
+		      matched = str;
+		    match++;
+		  }
+		break;
+ 	      case ipv6_match:
+		if (CMD_IPV6 (str))
+		  match++;
+		break;
+	      case ipv6_prefix_match:
+		if ((ret = cmd_ipv6_prefix_match (command)) != no_match)
+		  {
+		    if (ret == partly_match)
+		      return 2; /* There is incomplete match. */
+
+		    match++;
+		  }
+		break;
+	      case ipv4_match:
+		if (CMD_IPV4 (str))
+		  match++;
+		break;
+	      case ipv4_prefix_match:
+		if ((ret = cmd_ipv4_prefix_match (command)) != no_match)
+		  {
+		    if (ret == partly_match)
+		      return 2; /* There is incomplete match. */
+
+		    match++;
+		  }
+		break;
+	      case extend_match:
+		if (CMD_OPTION (str) || CMD_VARIABLE (str))
+		  match++;
+		break;
+	      case no_match:
+	      default:
+		break;
+	      }
+	  }
+	if (! match)
+	  vector_slot (v, i) = NULL;
+      }
+  return 0;
+}
+
+/* If src matches dst return dst string, otherwise return NULL */
+char *
+cmd_entry_function (char *src, char *dst)
+{
+  /* Skip variable arguments. */
+  if (CMD_OPTION (dst) || CMD_VARIABLE (dst) || CMD_VARARG (dst) ||
+      CMD_IPV4 (dst) || CMD_IPV4_PREFIX (dst) || CMD_RANGE (dst))
+    return NULL;
+
+  /* In case of 'command \t', given src is NULL string. */
+  if (src == NULL)
+    return dst;
+
+  /* Matched with input string. */
+  if (strncmp (src, dst, strlen (src)) == 0)
+    return dst;
+
+  return NULL;
+}
+
+/* If src matches dst return dst string, otherwise return NULL */
+/* This version will return the dst string always if it is
+   CMD_VARIABLE for '?' key processing */
+char *
+cmd_entry_function_desc (char *src, char *dst)
+{
+  if (CMD_VARARG (dst))
+    return dst;
+
+  if (CMD_RANGE (dst))
+    {
+      if (cmd_range_match (dst, src))
+	return dst;
+      else
+	return NULL;
+    }
+
+  if (CMD_IPV6 (dst))
+    {
+      if (cmd_ipv6_match (src))
+	return dst;
+      else
+	return NULL;
+    }
+
+  if (CMD_IPV6_PREFIX (dst))
+    {
+      if (cmd_ipv6_prefix_match (src))
+	return dst;
+      else
+	return NULL;
+    }
+
+  if (CMD_IPV4 (dst))
+    {
+      if (cmd_ipv4_match (src))
+	return dst;
+      else
+	return NULL;
+    }
+
+  if (CMD_IPV4_PREFIX (dst))
+    {
+      if (cmd_ipv4_prefix_match (src))
+	return dst;
+      else
+	return NULL;
+    }
+
+  /* Optional or variable commands always match on '?' */
+  if (CMD_OPTION (dst) || CMD_VARIABLE (dst))
+    return dst;
+
+  /* In case of 'command \t', given src is NULL string. */
+  if (src == NULL)
+    return dst;
+
+  if (strncmp (src, dst, strlen (src)) == 0)
+    return dst;
+  else
+    return NULL;
+}
+
+/* Check same string element existence.  If it isn't there return
+    1. */
+int
+cmd_unique_string (vector v, char *str)
+{
+  int i;
+  char *match;
+
+  for (i = 0; i < vector_max (v); i++)
+    if ((match = vector_slot (v, i)) != NULL)
+      if (strcmp (match, str) == 0)
+	return 0;
+  return 1;
+}
+
+/* Compare string to description vector.  If there is same string
+   return 1 else return 0. */
+int
+desc_unique_string (vector v, char *str)
+{
+  int i;
+  struct desc *desc;
+
+  for (i = 0; i < vector_max (v); i++)
+    if ((desc = vector_slot (v, i)) != NULL)
+      if (strcmp (desc->cmd, str) == 0)
+	return 1;
+  return 0;
+}
+
+/* '?' describe command support. */
+vector
+cmd_describe_command (vector vline, struct vty *vty, int *status)
+{
+  int i;
+  vector cmd_vector;
+#define INIT_MATCHVEC_SIZE 10
+  vector matchvec;
+  struct cmd_element *cmd_element;
+  int index;
+  static struct desc desc_cr = { "<cr>", "" };
+
+  /* Set index. */
+  index = vector_max (vline) - 1;
+
+  /* Make copy vector of current node's command vector. */
+  cmd_vector = vector_copy (cmd_node_vector (cmdvec, vty->node));
+
+  /* Prepare match vector */
+  matchvec = vector_init (INIT_MATCHVEC_SIZE);
+
+  /* Filter commands. */
+  for (i = 0; i < index; i++)
+    {
+      enum match_type match;
+      char *command;
+      int ret;
+
+      command = vector_slot (vline, i);
+
+      match = cmd_filter_by_completion (command, cmd_vector, i);
+
+      if (match == vararg_match)
+	{
+	  struct cmd_element *cmd_element;
+	  vector descvec;
+	  int j, k;
+
+	  for (j = 0; j < vector_max (cmd_vector); j++)
+	    if ((cmd_element = vector_slot (cmd_vector, j)) != NULL)
+	      {
+		descvec = vector_slot (cmd_element->strvec,
+				       vector_max (cmd_element->strvec) - 1);
+		for (k = 0; k < vector_max (descvec); k++)
+		  {
+		    struct desc *desc = vector_slot (descvec, k);
+		    vector_set (matchvec, desc);
+		  }
+	      }
+
+	  vector_set (matchvec, &desc_cr);
+
+	  vector_free (cmd_vector);
+
+	  return matchvec;
+	}
+
+      if ((ret = is_cmd_ambiguous (command, cmd_vector, i, match)) == 1)
+	{
+	  vector_free (cmd_vector);
+	  *status = CMD_ERR_AMBIGUOUS;
+	  return NULL;
+	}
+      else if (ret == 2)
+	{
+	  vector_free (cmd_vector);
+	  *status = CMD_ERR_NO_MATCH;
+	  return NULL;
+	}
+    }
+
+  /* Prepare match vector */
+  /*  matchvec = vector_init (INIT_MATCHVEC_SIZE); */
+
+  /* Make description vector. */
+  for (i = 0; i < vector_max (cmd_vector); i++)
+    if ((cmd_element = vector_slot (cmd_vector, i)) != NULL)
+      {
+	char *string = NULL;
+	vector strvec = cmd_element->strvec;
+
+	if (index > vector_max (strvec))
+	  vector_slot (cmd_vector, i) = NULL;
+	else
+	  {
+	    /* Check is command is completed. */
+	    if (index == vector_max (strvec))
+	      {
+		string = "<cr>";
+		if (! desc_unique_string (matchvec, string))
+		  vector_set (matchvec, &desc_cr);
+	      }
+	    else
+	      {
+		int j;
+		vector descvec = vector_slot (strvec, index);
+		struct desc *desc;
+
+		for (j = 0; j < vector_max (descvec); j++)
+		  {
+		    desc = vector_slot (descvec, j);
+		    string = cmd_entry_function_desc (vector_slot (vline, index), desc->cmd);
+		    if (string)
+		      {
+			/* Uniqueness check */
+			if (! desc_unique_string (matchvec, string))
+			  vector_set (matchvec, desc);
+		      }
+		  }
+	      }
+	  }
+      }
+  vector_free (cmd_vector);
+
+  if (vector_slot (matchvec, 0) == NULL)
+    {
+      vector_free (matchvec);
+      *status= CMD_ERR_NO_MATCH;
+    }
+  else
+    *status = CMD_SUCCESS;
+
+  return matchvec;
+}
+
+/* Check LCD of matched command. */
+int
+cmd_lcd (char **matched)
+{
+  int i;
+  int j;
+  int lcd = -1;
+  char *s1, *s2;
+  char c1, c2;
+
+  if (matched[0] == NULL || matched[1] == NULL)
+    return 0;
+
+  for (i = 1; matched[i] != NULL; i++)
+    {
+      s1 = matched[i - 1];
+      s2 = matched[i];
+
+      for (j = 0; (c1 = s1[j]) && (c2 = s2[j]); j++)
+	if (c1 != c2)
+	  break;
+
+      if (lcd < 0)
+	lcd = j;
+      else
+	{
+	  if (lcd > j)
+	    lcd = j;
+	}
+    }
+  return lcd;
+}
+
+/* Command line completion support. */
+char **
+cmd_complete_command (vector vline, struct vty *vty, int *status)
+{
+  int i;
+  vector cmd_vector = vector_copy (cmd_node_vector (cmdvec, vty->node));
+#define INIT_MATCHVEC_SIZE 10
+  vector matchvec;
+  struct cmd_element *cmd_element;
+  int index = vector_max (vline) - 1;
+  char **match_str;
+  struct desc *desc;
+  vector descvec;
+  char *command;
+  int lcd;
+
+  /* First, filter by preceeding command string */
+  for (i = 0; i < index; i++)
+    {
+      enum match_type match;
+      int ret;
+
+      command = vector_slot (vline, i);
+
+      /* First try completion match, if there is exactly match return 1 */
+      match = cmd_filter_by_completion (command, cmd_vector, i);
+
+      /* If there is exact match then filter ambiguous match else check
+	 ambiguousness. */
+      if ((ret = is_cmd_ambiguous (command, cmd_vector, i, match)) == 1)
+	{
+	  vector_free (cmd_vector);
+	  *status = CMD_ERR_AMBIGUOUS;
+	  return NULL;
+	}
+      /*
+	else if (ret == 2)
+	{
+	  vector_free (cmd_vector);
+	  *status = CMD_ERR_NO_MATCH;
+	  return NULL;
+	}
+      */
+    }
+
+  /* Prepare match vector. */
+  matchvec = vector_init (INIT_MATCHVEC_SIZE);
+
+  /* Now we got into completion */
+  for (i = 0; i < vector_max (cmd_vector); i++)
+    if ((cmd_element = vector_slot (cmd_vector, i)) != NULL)
+      {
+	char *string;
+	vector strvec = cmd_element->strvec;
+	
+	/* Check field length */
+	if (index >= vector_max (strvec))
+	  vector_slot (cmd_vector, i) = NULL;
+	else 
+	  {
+	    int j;
+
+	    descvec = vector_slot (strvec, index);
+	    for (j = 0; j < vector_max (descvec); j++)
+	      {
+		desc = vector_slot (descvec, j);
+
+		if ((string = cmd_entry_function (vector_slot (vline, index),
+						  desc->cmd)))
+		  if (cmd_unique_string (matchvec, string))
+		    vector_set (matchvec, XSTRDUP (MTYPE_TMP, string));
+	      }
+	  }
+      }
+
+  /* We don't need cmd_vector any more. */
+  vector_free (cmd_vector);
+
+  /* No matched command */
+  if (vector_slot (matchvec, 0) == NULL)
+    {
+      vector_free (matchvec);
+
+      /* In case of 'command \t' pattern.  Do you need '?' command at
+         the end of the line. */
+      if (vector_slot (vline, index) == '\0')
+	*status = CMD_ERR_NOTHING_TODO;
+      else
+	*status = CMD_ERR_NO_MATCH;
+      return NULL;
+    }
+
+  /* Only one matched */
+  if (vector_slot (matchvec, 1) == NULL)
+    {
+      match_str = (char **) matchvec->index;
+      vector_only_wrapper_free (matchvec);
+      *status = CMD_COMPLETE_FULL_MATCH;
+      return match_str;
+    }
+  /* Make it sure last element is NULL. */
+  vector_set (matchvec, NULL);
+
+  /* Check LCD of matched strings. */
+  if (vector_slot (vline, index) != NULL)
+    {
+      lcd = cmd_lcd ((char **) matchvec->index);
+
+      if (lcd)
+	{
+	  int len = strlen (vector_slot (vline, index));
+	  
+	  if (len < lcd)
+	    {
+	      char *lcdstr;
+	      
+	      lcdstr = XMALLOC (MTYPE_TMP, lcd + 1);
+	      memcpy (lcdstr, matchvec->index[0], lcd);
+	      lcdstr[lcd] = '\0';
+
+	      /* match_str = (char **) &lcdstr; */
+
+	      /* Free matchvec. */
+	      for (i = 0; i < vector_max (matchvec); i++)
+		{
+		  if (vector_slot (matchvec, i))
+		    XFREE (MTYPE_TMP, vector_slot (matchvec, i));
+		}
+	      vector_free (matchvec);
+
+      	      /* Make new matchvec. */
+	      matchvec = vector_init (INIT_MATCHVEC_SIZE);
+	      vector_set (matchvec, lcdstr);
+	      match_str = (char **) matchvec->index;
+	      vector_only_wrapper_free (matchvec);
+
+	      *status = CMD_COMPLETE_MATCH;
+	      return match_str;
+	    }
+	}
+    }
+
+  match_str = (char **) matchvec->index;
+  vector_only_wrapper_free (matchvec);
+  *status = CMD_COMPLETE_LIST_MATCH;
+  return match_str;
+}
+
+/* Execute command by argument vline vector. */
+int
+cmd_execute_command (vector vline, struct vty *vty, struct cmd_element **cmd)
+{
+  int i;
+  int index;
+  vector cmd_vector;
+  struct cmd_element *cmd_element;
+  struct cmd_element *matched_element;
+  unsigned int matched_count, incomplete_count;
+  int argc;
+  char *argv[CMD_ARGC_MAX];
+  enum match_type match = 0;
+  int varflag;
+  char *command;
+
+  /* Make copy of command elements. */
+  cmd_vector = vector_copy (cmd_node_vector (cmdvec, vty->node));
+
+  for (index = 0; index < vector_max (vline); index++) 
+    {
+      int ret;
+
+      command = vector_slot (vline, index);
+
+      match = cmd_filter_by_completion (command, cmd_vector, index);
+
+      if (match == vararg_match)
+	break;
+
+      ret = is_cmd_ambiguous (command, cmd_vector, index, match);
+
+      if (ret == 1)
+	{
+	  vector_free (cmd_vector);
+	  return CMD_ERR_AMBIGUOUS;
+	}
+      else if (ret == 2)
+	{
+	  vector_free (cmd_vector);
+	  return CMD_ERR_NO_MATCH;
+	}
+    }
+
+  /* Check matched count. */
+  matched_element = NULL;
+  matched_count = 0;
+  incomplete_count = 0;
+
+  for (i = 0; i < vector_max (cmd_vector); i++) 
+    if (vector_slot (cmd_vector,i) != NULL)
+      {
+	cmd_element = vector_slot (cmd_vector,i);
+
+	if (match == vararg_match || index >= cmd_element->cmdsize)
+	  {
+	    matched_element = cmd_element;
+#if 0
+	    printf ("DEBUG: %s\n", cmd_element->string);
+#endif
+	    matched_count++;
+	  }
+	else
+	  {
+	    incomplete_count++;
+	  }
+      }
+  
+  /* Finish of using cmd_vector. */
+  vector_free (cmd_vector);
+
+  /* To execute command, matched_count must be 1.*/
+  if (matched_count == 0) 
+    {
+      if (incomplete_count)
+	return CMD_ERR_INCOMPLETE;
+      else
+	return CMD_ERR_NO_MATCH;
+    }
+
+  if (matched_count > 1) 
+    return CMD_ERR_AMBIGUOUS;
+
+  /* Argument treatment */
+  varflag = 0;
+  argc = 0;
+
+  for (i = 0; i < vector_max (vline); i++)
+    {
+      if (varflag)
+	argv[argc++] = vector_slot (vline, i);
+      else
+	{	  
+	  vector descvec = vector_slot (matched_element->strvec, i);
+
+	  if (vector_max (descvec) == 1)
+	    {
+	      struct desc *desc = vector_slot (descvec, 0);
+	      char *str = desc->cmd;
+
+	      if (CMD_VARARG (str))
+		varflag = 1;
+
+	      if (varflag || CMD_VARIABLE (str) || CMD_OPTION (str))
+		argv[argc++] = vector_slot (vline, i);
+	    }
+	  else
+	    argv[argc++] = vector_slot (vline, i);
+	}
+
+      if (argc >= CMD_ARGC_MAX)
+	return CMD_ERR_EXEED_ARGC_MAX;
+    }
+
+  /* For vtysh execution. */
+  if (cmd)
+    *cmd = matched_element;
+
+  if (matched_element->daemon)
+    return CMD_SUCCESS_DAEMON;
+
+  /* Execute matched command. */
+  return (*matched_element->func) (matched_element, vty, argc, argv);
+}
+
+/* Execute command by argument readline. */
+int
+cmd_execute_command_strict (vector vline, struct vty *vty, 
+			    struct cmd_element **cmd)
+{
+  int i;
+  int index;
+  vector cmd_vector;
+  struct cmd_element *cmd_element;
+  struct cmd_element *matched_element;
+  unsigned int matched_count, incomplete_count;
+  int argc;
+  char *argv[CMD_ARGC_MAX];
+  int varflag;
+  enum match_type match = 0;
+  char *command;
+
+  /* Make copy of command element */
+  cmd_vector = vector_copy (cmd_node_vector (cmdvec, vty->node));
+
+  for (index = 0; index < vector_max (vline); index++) 
+    {
+      int ret;
+
+      command = vector_slot (vline, index);
+
+      match = cmd_filter_by_string (vector_slot (vline, index), 
+				    cmd_vector, index);
+
+      /* If command meets '.VARARG' then finish matching. */
+      if (match == vararg_match)
+	break;
+
+      ret = is_cmd_ambiguous (command, cmd_vector, index, match);
+      if (ret == 1)
+	{
+	  vector_free (cmd_vector);
+	  return CMD_ERR_AMBIGUOUS;
+	}
+      if (ret == 2)
+	{
+	  vector_free (cmd_vector);
+	  return CMD_ERR_NO_MATCH;
+	}
+    }
+
+  /* Check matched count. */
+  matched_element = NULL;
+  matched_count = 0;
+  incomplete_count = 0;
+  for (i = 0; i < vector_max (cmd_vector); i++) 
+    if (vector_slot (cmd_vector,i) != NULL)
+      {
+	cmd_element = vector_slot (cmd_vector,i);
+
+	if (match == vararg_match || index >= cmd_element->cmdsize)
+	  {
+	    matched_element = cmd_element;
+	    matched_count++;
+	  }
+	else
+	  incomplete_count++;
+      }
+  
+  /* Finish of using cmd_vector. */
+  vector_free (cmd_vector);
+
+  /* To execute command, matched_count must be 1.*/
+  if (matched_count == 0) 
+    {
+      if (incomplete_count)
+	return CMD_ERR_INCOMPLETE;
+      else
+	return CMD_ERR_NO_MATCH;
+    }
+
+  if (matched_count > 1) 
+    return CMD_ERR_AMBIGUOUS;
+
+  /* Argument treatment */
+  varflag = 0;
+  argc = 0;
+
+  for (i = 0; i < vector_max (vline); i++)
+    {
+      if (varflag)
+	argv[argc++] = vector_slot (vline, i);
+      else
+	{	  
+	  vector descvec = vector_slot (matched_element->strvec, i);
+
+	  if (vector_max (descvec) == 1)
+	    {
+	      struct desc *desc = vector_slot (descvec, 0);
+	      char *str = desc->cmd;
+
+	      if (CMD_VARARG (str))
+		varflag = 1;
+	  
+	      if (varflag || CMD_VARIABLE (str) || CMD_OPTION (str))
+		argv[argc++] = vector_slot (vline, i);
+	    }
+	  else
+	    argv[argc++] = vector_slot (vline, i);
+	}
+
+      if (argc >= CMD_ARGC_MAX)
+	return CMD_ERR_EXEED_ARGC_MAX;
+    }
+
+  /* For vtysh execution. */
+  if (cmd)
+    *cmd = matched_element;
+
+  if (matched_element->daemon)
+    return CMD_SUCCESS_DAEMON;
+
+  /* Now execute matched command */
+  return (*matched_element->func) (matched_element, vty, argc, argv);
+}
+
+/* Configration make from file. */
+int
+config_from_file (struct vty *vty, FILE *fp)
+{
+  int ret;
+  vector vline;
+
+  while (fgets (vty->buf, VTY_BUFSIZ, fp))
+    {
+      vline = cmd_make_strvec (vty->buf);
+
+      /* In case of comment line */
+      if (vline == NULL)
+	continue;
+      /* Execute configuration command : this is strict match */
+      ret = cmd_execute_command_strict (vline, vty, NULL);
+
+      /* Try again with setting node to CONFIG_NODE */
+      if (ret != CMD_SUCCESS && ret != CMD_WARNING)
+	{
+	  if (vty->node == KEYCHAIN_KEY_NODE)
+	    {
+	      vty->node = KEYCHAIN_NODE;
+
+	      ret = cmd_execute_command_strict (vline, vty, NULL);
+
+	      if (ret != CMD_SUCCESS && ret != CMD_WARNING)
+		{
+		  vty->node = CONFIG_NODE;
+		  ret = cmd_execute_command_strict (vline, vty, NULL);
+		}
+	    }
+	  else
+	    {
+	      vty->node = CONFIG_NODE;
+	      ret = cmd_execute_command_strict (vline, vty, NULL);
+	    }
+	}	  
+
+      cmd_free_strvec (vline);
+
+      if (ret != CMD_SUCCESS && ret != CMD_WARNING)
+	return ret;
+    }
+  return CMD_SUCCESS;
+}
+
+/* Configration from terminal */
+DEFUN (config_terminal,
+       config_terminal_cmd,
+       "configure terminal",
+       "Configuration from vty interface\n"
+       "Configuration terminal\n")
+{
+  if (vty_config_lock (vty))
+    vty->node = CONFIG_NODE;
+  else
+    {
+      vty_out (vty, "VTY configuration is locked by other VTY%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+  return CMD_SUCCESS;
+}
+
+/* Enable command */
+DEFUN (enable, 
+       config_enable_cmd,
+       "enable",
+       "Turn on privileged mode command\n")
+{
+  /* If enable password is NULL, change to ENABLE_NODE */
+  if ((host.enable == NULL && host.enable_encrypt == NULL) ||
+      vty->type == VTY_SHELL_SERV)
+    vty->node = ENABLE_NODE;
+  else
+    vty->node = AUTH_ENABLE_NODE;
+
+  return CMD_SUCCESS;
+}
+
+/* Disable command */
+DEFUN (disable, 
+       config_disable_cmd,
+       "disable",
+       "Turn off privileged mode command\n")
+{
+  if (vty->node == ENABLE_NODE)
+    vty->node = VIEW_NODE;
+  return CMD_SUCCESS;
+}
+
+/* Down vty node level. */
+DEFUN (config_exit,
+       config_exit_cmd,
+       "exit",
+       "Exit current mode and down to previous mode\n")
+{
+  switch (vty->node)
+    {
+    case VIEW_NODE:
+    case ENABLE_NODE:
+      if (vty_shell (vty))
+	exit (0);
+      else
+	vty->status = VTY_CLOSE;
+      break;
+    case CONFIG_NODE:
+      vty->node = ENABLE_NODE;
+      vty_config_unlock (vty);
+      break;
+    case INTERFACE_NODE:
+    case ZEBRA_NODE:
+    case BGP_NODE:
+    case RIP_NODE:
+    case RIPNG_NODE:
+    case OSPF_NODE:
+    case OSPF6_NODE:
+    case KEYCHAIN_NODE:
+    case MASC_NODE:
+    case RMAP_NODE:
+    case VTY_NODE:
+      vty->node = CONFIG_NODE;
+      break;
+    case BGP_VPNV4_NODE:
+    case BGP_IPV4_NODE:
+    case BGP_IPV4M_NODE:
+    case BGP_IPV6_NODE:
+      vty->node = BGP_NODE;
+      break;
+    case KEYCHAIN_KEY_NODE:
+      vty->node = KEYCHAIN_NODE;
+      break;
+    default:
+      break;
+    }
+  return CMD_SUCCESS;
+}
+
+/* quit is alias of exit. */
+ALIAS (config_exit,
+       config_quit_cmd,
+       "quit",
+       "Exit current mode and down to previous mode\n")
+       
+/* End of configuration. */
+DEFUN (config_end,
+       config_end_cmd,
+       "end",
+       "End current mode and change to enable mode.")
+{
+  switch (vty->node)
+    {
+    case VIEW_NODE:
+    case ENABLE_NODE:
+      /* Nothing to do. */
+      break;
+    case CONFIG_NODE:
+    case INTERFACE_NODE:
+    case ZEBRA_NODE:
+    case RIP_NODE:
+    case RIPNG_NODE:
+    case BGP_NODE:
+    case BGP_VPNV4_NODE:
+    case BGP_IPV4_NODE:
+    case BGP_IPV4M_NODE:
+    case BGP_IPV6_NODE:
+    case RMAP_NODE:
+    case OSPF_NODE:
+    case OSPF6_NODE:
+    case KEYCHAIN_NODE:
+    case KEYCHAIN_KEY_NODE:
+    case MASC_NODE:
+    case VTY_NODE:
+      vty_config_unlock (vty);
+      vty->node = ENABLE_NODE;
+      break;
+    default:
+      break;
+    }
+  return CMD_SUCCESS;
+}
+
+/* Show version. */
+DEFUN (show_version,
+       show_version_cmd,
+       "show version",
+       SHOW_STR
+       "Displays zebra version\n")
+{
+  vty_out (vty, "Zebra %s (%s).%s", ZEBRA_VERSION,
+	   host_name,
+	   VTY_NEWLINE);
+  vty_out (vty, "Copyright 1996-2002, Kunihiro Ishiguro.%s", VTY_NEWLINE);
+
+  return CMD_SUCCESS;
+}
+
+/* Help display function for all node. */
+DEFUN (config_help,
+       config_help_cmd,
+       "help",
+       "Description of the interactive help system\n")
+{
+  vty_out (vty, 
+	   "Zebra VTY provides advanced help feature.  When you need help,%s\
+anytime at the command line please press '?'.%s\
+%s\
+If nothing matches, the help list will be empty and you must backup%s\
+ until entering a '?' shows the available options.%s\
+Two styles of help are provided:%s\
+1. Full help is available when you are ready to enter a%s\
+command argument (e.g. 'show ?') and describes each possible%s\
+argument.%s\
+2. Partial help is provided when an abbreviated argument is entered%s\
+   and you want to know what arguments match the input%s\
+   (e.g. 'show me?'.)%s%s", VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE,
+	   VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE,
+	   VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE);
+  return CMD_SUCCESS;
+}
+
+/* Help display function for all node. */
+DEFUN (config_list,
+       config_list_cmd,
+       "list",
+       "Print command list\n")
+{
+  int i;
+  struct cmd_node *cnode = vector_slot (cmdvec, vty->node);
+  struct cmd_element *cmd;
+
+  for (i = 0; i < vector_max (cnode->cmd_vector); i++)
+    if ((cmd = vector_slot (cnode->cmd_vector, i)) != NULL)
+      vty_out (vty, "  %s%s", cmd->string,
+	       VTY_NEWLINE);
+  return CMD_SUCCESS;
+}
+
+/* Write current configuration into file. */
+DEFUN (config_write_file, 
+       config_write_file_cmd,
+       "write file",  
+       "Write running configuration to memory, network, or terminal\n"
+       "Write to configuration file\n")
+{
+  int i;
+  int fd;
+  struct cmd_node *node;
+  char *config_file;
+  char *config_file_tmp = NULL;
+  char *config_file_sav = NULL;
+  struct vty *file_vty;
+
+  /* Check and see if we are operating under vtysh configuration */
+  if (host.config == NULL)
+    {
+      vty_out (vty, "Can't save to configuration file, using vtysh.%s",
+	       VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  /* Get filename. */
+  config_file = host.config;
+  
+  config_file_sav = malloc (strlen (config_file) + strlen (CONF_BACKUP_EXT) + 1);
+  strcpy (config_file_sav, config_file);
+  strcat (config_file_sav, CONF_BACKUP_EXT);
+
+
+  config_file_tmp = malloc (strlen (config_file) + 8);
+  sprintf (config_file_tmp, "%s.XXXXXX", config_file);
+  
+  /* Open file to configuration write. */
+  fd = mkstemp (config_file_tmp);
+  if (fd < 0)
+    {
+      vty_out (vty, "Can't open configuration file %s.%s", config_file_tmp,
+	       VTY_NEWLINE);
+      free (config_file_tmp);
+      free (config_file_sav);
+      return CMD_WARNING;
+    }
+  
+  /* Make vty for configuration file. */
+  file_vty = vty_new ();
+  file_vty->fd = fd;
+  file_vty->type = VTY_FILE;
+
+  /* Config file header print. */
+  vty_out (file_vty, "!\n! Zebra configuration saved from vty\n!   ");
+  vty_time_print (file_vty, 1);
+  vty_out (file_vty, "!\n");
+
+  for (i = 0; i < vector_max (cmdvec); i++)
+    if ((node = vector_slot (cmdvec, i)) && node->func)
+      {
+	if ((*node->func) (file_vty))
+	  vty_out (file_vty, "!\n");
+      }
+  vty_close (file_vty);
+
+  if (unlink (config_file_sav) != 0)
+    if (errno != ENOENT)
+      {
+	vty_out (vty, "Can't unlink backup configuration file %s.%s", config_file_sav,
+		 VTY_NEWLINE);
+	free (config_file_sav);
+	free (config_file_tmp);
+	unlink (config_file_tmp);	
+	return CMD_WARNING;
+      }
+  if (link (config_file, config_file_sav) != 0)
+    {
+      vty_out (vty, "Can't backup old configuration file %s.%s", config_file_sav,
+	        VTY_NEWLINE);
+      free (config_file_sav);
+      free (config_file_tmp);
+      unlink (config_file_tmp);
+      return CMD_WARNING;
+    }
+  sync ();
+  if (unlink (config_file) != 0)
+    {
+      vty_out (vty, "Can't unlink configuration file %s.%s", config_file,
+	        VTY_NEWLINE);
+      free (config_file_sav);
+      free (config_file_tmp);
+      unlink (config_file_tmp);
+      return CMD_WARNING;      
+    }
+  if (link (config_file_tmp, config_file) != 0)
+    {
+      vty_out (vty, "Can't save configuration file %s.%s", config_file,
+	       VTY_NEWLINE);
+      free (config_file_sav);
+      free (config_file_tmp);
+      unlink (config_file_tmp);
+      return CMD_WARNING;      
+    }
+  unlink (config_file_tmp);
+  sync ();
+  
+  free (config_file_sav);
+  free (config_file_tmp);
+  vty_out (vty, "Configuration saved to %s%s", config_file,
+	   VTY_NEWLINE);
+  return CMD_SUCCESS;
+}
+
+ALIAS (config_write_file, 
+       config_write_cmd,
+       "write",  
+       "Write running configuration to memory, network, or terminal\n")
+
+ALIAS (config_write_file, 
+       config_write_memory_cmd,
+       "write memory",  
+       "Write running configuration to memory, network, or terminal\n"
+       "Write configuration to the file (same as write file)\n")
+
+ALIAS (config_write_file, 
+       copy_runningconfig_startupconfig_cmd,
+       "copy running-config startup-config",  
+       "Copy configuration\n"
+       "Copy running config to... \n"
+       "Copy running config to startup config (same as write file)\n")
+
+/* Write current configuration into the terminal. */
+DEFUN (config_write_terminal,
+       config_write_terminal_cmd,
+       "write terminal",
+       "Write running configuration to memory, network, or terminal\n"
+       "Write to terminal\n")
+{
+  int i;
+  struct cmd_node *node;
+
+  if (vty->type == VTY_SHELL_SERV)
+    {
+      for (i = 0; i < vector_max (cmdvec); i++)
+	if ((node = vector_slot (cmdvec, i)) && node->func && node->vtysh)
+	  {
+	    if ((*node->func) (vty))
+	      vty_out (vty, "!%s", VTY_NEWLINE);
+	  }
+    }
+  else
+    {
+      vty_out (vty, "%sCurrent configuration:%s", VTY_NEWLINE,
+	       VTY_NEWLINE);
+      vty_out (vty, "!%s", VTY_NEWLINE);
+
+      for (i = 0; i < vector_max (cmdvec); i++)
+	if ((node = vector_slot (cmdvec, i)) && node->func)
+	  {
+	    if ((*node->func) (vty))
+	      vty_out (vty, "!%s", VTY_NEWLINE);
+	  }
+      vty_out (vty, "end%s",VTY_NEWLINE);
+    }
+  return CMD_SUCCESS;
+}
+
+/* Write current configuration into the terminal. */
+ALIAS (config_write_terminal,
+       show_running_config_cmd,
+       "show running-config",
+       SHOW_STR
+       "running configuration\n")
+
+/* Write startup configuration into the terminal. */
+DEFUN (show_startup_config,
+       show_startup_config_cmd,
+       "show startup-config",
+       SHOW_STR
+       "Contentes of startup configuration\n")
+{
+  char buf[BUFSIZ];
+  FILE *confp;
+
+  confp = fopen (host.config, "r");
+  if (confp == NULL)
+    {
+      vty_out (vty, "Can't open configuration file [%s]%s",
+	       host.config, VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  while (fgets (buf, BUFSIZ, confp))
+    {
+      char *cp = buf;
+
+      while (*cp != '\r' && *cp != '\n' && *cp != '\0')
+	cp++;
+      *cp = '\0';
+
+      vty_out (vty, "%s%s", buf, VTY_NEWLINE);
+    }
+
+  fclose (confp);
+
+  return CMD_SUCCESS;
+}
+
+/* Hostname configuration */
+DEFUN (config_hostname, 
+       hostname_cmd,
+       "hostname WORD",
+       "Set system's network name\n"
+       "This system's network name\n")
+{
+  if (!isalpha((int) *argv[0]))
+    {
+      vty_out (vty, "Please specify string starting with alphabet%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  if (host.name)
+    XFREE (0, host.name);
+    
+  host.name = strdup (argv[0]);
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_no_hostname, 
+       no_hostname_cmd,
+       "no hostname [HOSTNAME]",
+       NO_STR
+       "Reset system's network name\n"
+       "Host name of this router\n")
+{
+  if (host.name)
+    XFREE (0, host.name);
+  host.name = NULL;
+  return CMD_SUCCESS;
+}
+
+/* VTY interface password set. */
+DEFUN (config_password, password_cmd,
+       "password (8|) WORD",
+       "Assign the terminal connection password\n"
+       "Specifies a HIDDEN password will follow\n"
+       "dummy string \n"
+       "The HIDDEN line password string\n")
+{
+  /* Argument check. */
+  if (argc == 0)
+    {
+      vty_out (vty, "Please specify password.%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  if (argc == 2)
+    {
+      if (*argv[0] == '8')
+	{
+	  if (host.password)
+	    XFREE (0, host.password);
+	  host.password = NULL;
+	  if (host.password_encrypt)
+	    XFREE (0, host.password_encrypt);
+	  host.password_encrypt = XSTRDUP (0, strdup (argv[1]));
+	  return CMD_SUCCESS;
+	}
+      else
+	{
+	  vty_out (vty, "Unknown encryption type.%s", VTY_NEWLINE);
+	  return CMD_WARNING;
+	}
+    }
+
+  if (!isalnum ((int) *argv[0]))
+    {
+      vty_out (vty, 
+	       "Please specify string starting with alphanumeric%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  if (host.password)
+    XFREE (0, host.password);
+  host.password = NULL;
+
+  if (host.encrypt)
+    {
+      if (host.password_encrypt)
+	XFREE (0, host.password_encrypt);
+      host.password_encrypt = XSTRDUP (0, zencrypt (argv[0]));
+    }
+  else
+    host.password = XSTRDUP (0, argv[0]);
+
+  return CMD_SUCCESS;
+}
+
+ALIAS (config_password, password_text_cmd,
+       "password LINE",
+       "Assign the terminal connection password\n"
+       "The UNENCRYPTED (cleartext) line password\n")
+
+/* VTY enable password set. */
+DEFUN (config_enable_password, enable_password_cmd,
+       "enable password (8|) WORD",
+       "Modify enable password parameters\n"
+       "Assign the privileged level password\n"
+       "Specifies a HIDDEN password will follow\n"
+       "dummy string \n"
+       "The HIDDEN 'enable' password string\n")
+{
+  /* Argument check. */
+  if (argc == 0)
+    {
+      vty_out (vty, "Please specify password.%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  /* Crypt type is specified. */
+  if (argc == 2)
+    {
+      if (*argv[0] == '8')
+	{
+	  if (host.enable)
+	    XFREE (0, host.enable);
+	  host.enable = NULL;
+
+	  if (host.enable_encrypt)
+	    XFREE (0, host.enable_encrypt);
+	  host.enable_encrypt = XSTRDUP (0, argv[1]);
+
+	  return CMD_SUCCESS;
+	}
+      else
+	{
+	  vty_out (vty, "Unknown encryption type.%s", VTY_NEWLINE);
+	  return CMD_WARNING;
+	}
+    }
+
+  if (!isalnum ((int) *argv[0]))
+    {
+      vty_out (vty, 
+	       "Please specify string starting with alphanumeric%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+
+  if (host.enable)
+    XFREE (0, host.enable);
+  host.enable = NULL;
+
+  /* Plain password input. */
+  if (host.encrypt)
+    {
+      if (host.enable_encrypt)
+	XFREE (0, host.enable_encrypt);
+      host.enable_encrypt = XSTRDUP (0, zencrypt (argv[0]));
+    }
+  else
+    host.enable = XSTRDUP (0, argv[0]);
+
+  return CMD_SUCCESS;
+}
+
+ALIAS (config_enable_password,
+       enable_password_text_cmd,
+       "enable password LINE",
+       "Modify enable password parameters\n"
+       "Assign the privileged level password\n"
+       "The UNENCRYPTED (cleartext) 'enable' password\n")
+
+/* VTY enable password delete. */
+DEFUN (no_config_enable_password, no_enable_password_cmd,
+       "no enable password",
+       NO_STR
+       "Modify enable password parameters\n"
+       "Assign the privileged level password\n")
+{
+  if (host.enable)
+    XFREE (0, host.enable);
+  host.enable = NULL;
+
+  if (host.enable_encrypt)
+    XFREE (0, host.enable_encrypt);
+  host.enable_encrypt = NULL;
+
+  return CMD_SUCCESS;
+}
+	
+DEFUN (service_password_encrypt,
+       service_password_encrypt_cmd,
+       "service password-encryption",
+       "Set up miscellaneous service\n"
+       "Enable encrypted passwords\n")
+{
+  if (host.encrypt)
+    return CMD_SUCCESS;
+
+  host.encrypt = 1;
+
+  if (host.password)
+    {
+      if (host.password_encrypt)
+	XFREE (0, host.password_encrypt);
+      host.password_encrypt = XSTRDUP (0, zencrypt (host.password));
+    }
+  if (host.enable)
+    {
+      if (host.enable_encrypt)
+	XFREE (0, host.enable_encrypt);
+      host.enable_encrypt = XSTRDUP (0, zencrypt (host.enable));
+    }
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_service_password_encrypt,
+       no_service_password_encrypt_cmd,
+       "no service password-encryption",
+       NO_STR
+       "Set up miscellaneous service\n"
+       "Enable encrypted passwords\n")
+{
+  if (! host.encrypt)
+    return CMD_SUCCESS;
+
+  host.encrypt = 0;
+
+  if (host.password_encrypt)
+    XFREE (0, host.password_encrypt);
+  host.password_encrypt = NULL;
+
+  if (host.enable_encrypt)
+    XFREE (0, host.enable_encrypt);
+  host.enable_encrypt = NULL;
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_terminal_length, config_terminal_length_cmd,
+       "terminal length <0-512>",
+       "Set terminal line parameters\n"
+       "Set number of lines on a screen\n"
+       "Number of lines on screen (0 for no pausing)\n")
+{
+  int lines;
+  char *endptr = NULL;
+
+  lines = strtol (argv[0], &endptr, 10);
+  if (lines < 0 || lines > 512 || *endptr != '\0')
+    {
+      vty_out (vty, "length is malformed%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+  vty->lines = lines;
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_terminal_no_length, config_terminal_no_length_cmd,
+       "terminal no length",
+       "Set terminal line parameters\n"
+       NO_STR
+       "Set number of lines on a screen\n")
+{
+  vty->lines = -1;
+  return CMD_SUCCESS;
+}
+
+DEFUN (service_terminal_length, service_terminal_length_cmd,
+       "service terminal-length <0-512>",
+       "Set up miscellaneous service\n"
+       "System wide terminal length configuration\n"
+       "Number of lines of VTY (0 means no line control)\n")
+{
+  int lines;
+  char *endptr = NULL;
+
+  lines = strtol (argv[0], &endptr, 10);
+  if (lines < 0 || lines > 512 || *endptr != '\0')
+    {
+      vty_out (vty, "length is malformed%s", VTY_NEWLINE);
+      return CMD_WARNING;
+    }
+  host.lines = lines;
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_service_terminal_length, no_service_terminal_length_cmd,
+       "no service terminal-length [<0-512>]",
+       NO_STR
+       "Set up miscellaneous service\n"
+       "System wide terminal length configuration\n"
+       "Number of lines of VTY (0 means no line control)\n")
+{
+  host.lines = -1;
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_log_stdout,
+       config_log_stdout_cmd,
+       "log stdout",
+       "Logging control\n"
+       "Logging goes to stdout\n")
+{
+  zlog_set_flag (NULL, ZLOG_STDOUT);
+  host.log_stdout = 1;
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_stdout,
+       no_config_log_stdout_cmd,
+       "no log stdout",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to stdout\n")
+{
+  zlog_reset_flag (NULL, ZLOG_STDOUT);
+  host.log_stdout = 0;
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_log_file,
+       config_log_file_cmd,
+       "log file FILENAME",
+       "Logging control\n"
+       "Logging to file\n"
+       "Logging filename\n")
+{
+  int ret;
+  char *cwd;
+  char *fullpath;
+
+  /* Path detection. */
+  if (! IS_DIRECTORY_SEP (*argv[0]))
+    {
+      cwd = getcwd (NULL, MAXPATHLEN);
+      fullpath = XMALLOC (MTYPE_TMP,
+			  strlen (cwd) + strlen (argv[0]) + 2);
+      sprintf (fullpath, "%s/%s", cwd, argv[0]);
+    }
+  else
+    fullpath = argv[0];
+
+  ret = zlog_set_file (NULL, ZLOG_FILE, fullpath);
+
+  if (!ret)
+    {
+      vty_out (vty, "can't open logfile %s\n", argv[0]);
+      return CMD_WARNING;
+    }
+
+  if (host.logfile)
+    XFREE (MTYPE_TMP, host.logfile);
+
+  host.logfile = strdup (argv[0]);
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_file,
+       no_config_log_file_cmd,
+       "no log file [FILENAME]",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to file\n"
+       "Logging file name\n")
+{
+  zlog_reset_file (NULL);
+
+  if (host.logfile)
+    XFREE (MTYPE_TMP, host.logfile);
+
+  host.logfile = NULL;
+
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_log_syslog,
+       config_log_syslog_cmd,
+       "log syslog",
+       "Logging control\n"
+       "Logging goes to syslog\n")
+{
+  zlog_set_flag (NULL, ZLOG_SYSLOG);
+  host.log_syslog = 1;
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_syslog,
+       no_config_log_syslog_cmd,
+       "no log syslog",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to syslog\n")
+{
+  zlog_reset_flag (NULL, ZLOG_SYSLOG);
+  host.log_syslog = 0;
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_log_trap,
+       config_log_trap_cmd,
+       "log trap (emergencies|alerts|critical|errors|warnings|notifications|informational|debugging)",
+       "Logging control\n"
+       "Limit logging to specifed level\n")
+{
+  int new_level ;
+  
+  for ( new_level = 0 ; zlog_priority [new_level] != NULL ; new_level ++ )
+    {
+    if ( strcmp ( argv[0], zlog_priority [new_level] ) == 0 )
+      /* found new logging level */
+      {
+      zlog_default->maskpri = new_level;
+      return CMD_SUCCESS;
+      }
+    }
+  return CMD_ERR_NO_MATCH;
+}
+
+DEFUN (no_config_log_trap,
+       no_config_log_trap_cmd,
+       "no log trap",
+       NO_STR
+       "Logging control\n"
+       "Permit all logging information\n")
+{
+  zlog_default->maskpri = LOG_DEBUG;
+  return CMD_SUCCESS;
+}
+
+DEFUN (config_log_record_priority,
+       config_log_record_priority_cmd,
+       "log record-priority",
+       "Logging control\n"
+       "Log the priority of the message within the message\n")
+{
+  zlog_default->record_priority = 1 ;
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_record_priority,
+       no_config_log_record_priority_cmd,
+       "no log record-priority",
+       NO_STR
+       "Logging control\n"
+       "Do not log the priority of the message within the message\n")
+{
+  zlog_default->record_priority = 0 ;
+  return CMD_SUCCESS;
+}
+
+
+DEFUN (banner_motd_default,
+       banner_motd_default_cmd,
+       "banner motd default",
+       "Set banner string\n"
+       "Strings for motd\n"
+       "Default string\n")
+{
+  host.motd = default_motd;
+  return CMD_SUCCESS;
+}
+
+DEFUN (no_banner_motd,
+       no_banner_motd_cmd,
+       "no banner motd",
+       NO_STR
+       "Set banner string\n"
+       "Strings for motd\n")
+{
+  host.motd = NULL;
+  return CMD_SUCCESS;
+}
+
+/* Set config filename.  Called from vty.c */
+void
+host_config_set (char *filename)
+{
+  host.config = strdup (filename);
+}
+
+void
+install_default (enum node_type node)
+{
+  install_element (node, &config_exit_cmd);
+  install_element (node, &config_quit_cmd);
+  install_element (node, &config_end_cmd);
+  install_element (node, &config_help_cmd);
+  install_element (node, &config_list_cmd);
+
+  install_element (node, &config_write_terminal_cmd);
+  install_element (node, &config_write_file_cmd);
+  install_element (node, &config_write_memory_cmd);
+  install_element (node, &config_write_cmd);
+  install_element (node, &show_running_config_cmd);
+}
+
+/* Initialize command interface. Install basic nodes and commands. */
+void
+cmd_init (int terminal)
+{
+  /* Allocate initial top vector of commands. */
+  cmdvec = vector_init (VECTOR_MIN_SIZE);
+
+  /* Default host value settings. */
+  host.name = NULL;
+  host.password = NULL;
+  host.enable = NULL;
+  host.logfile = NULL;
+  host.config = NULL;
+  host.lines = -1;
+  host.motd = default_motd;
+
+  /* Install top nodes. */
+  install_node (&view_node, NULL);
+  install_node (&enable_node, NULL);
+  install_node (&auth_node, NULL);
+  install_node (&auth_enable_node, NULL);
+  install_node (&config_node, config_write_host);
+
+  /* Each node's basic commands. */
+  install_element (VIEW_NODE, &show_version_cmd);
+  if (terminal)
+    {
+      install_element (VIEW_NODE, &config_list_cmd);
+      install_element (VIEW_NODE, &config_exit_cmd);
+      install_element (VIEW_NODE, &config_quit_cmd);
+      install_element (VIEW_NODE, &config_help_cmd);
+      install_element (VIEW_NODE, &config_enable_cmd);
+      install_element (VIEW_NODE, &config_terminal_length_cmd);
+      install_element (VIEW_NODE, &config_terminal_no_length_cmd);
+    }
+
+  if (terminal)
+    {
+      install_default (ENABLE_NODE);
+      install_element (ENABLE_NODE, &config_disable_cmd);
+      install_element (ENABLE_NODE, &config_terminal_cmd);
+      install_element (ENABLE_NODE, &copy_runningconfig_startupconfig_cmd);
+    }
+  install_element (ENABLE_NODE, &show_startup_config_cmd);
+  install_element (ENABLE_NODE, &show_version_cmd);
+  install_element (ENABLE_NODE, &config_terminal_length_cmd);
+  install_element (ENABLE_NODE, &config_terminal_no_length_cmd);
+
+  if (terminal)
+    install_default (CONFIG_NODE);
+  install_element (CONFIG_NODE, &hostname_cmd);
+  install_element (CONFIG_NODE, &no_hostname_cmd);
+  install_element (CONFIG_NODE, &password_cmd);
+  install_element (CONFIG_NODE, &password_text_cmd);
+  install_element (CONFIG_NODE, &enable_password_cmd);
+  install_element (CONFIG_NODE, &enable_password_text_cmd);
+  install_element (CONFIG_NODE, &no_enable_password_cmd);
+  if (terminal)
+    {
+      install_element (CONFIG_NODE, &config_log_stdout_cmd);
+      install_element (CONFIG_NODE, &no_config_log_stdout_cmd);
+      install_element (CONFIG_NODE, &config_log_file_cmd);
+      install_element (CONFIG_NODE, &no_config_log_file_cmd);
+      install_element (CONFIG_NODE, &config_log_syslog_cmd);
+      install_element (CONFIG_NODE, &no_config_log_syslog_cmd);
+      install_element (CONFIG_NODE, &config_log_trap_cmd);
+      install_element (CONFIG_NODE, &no_config_log_trap_cmd);
+      install_element (CONFIG_NODE, &config_log_record_priority_cmd);
+      install_element (CONFIG_NODE, &no_config_log_record_priority_cmd);
+      install_element (CONFIG_NODE, &service_password_encrypt_cmd);
+      install_element (CONFIG_NODE, &no_service_password_encrypt_cmd);
+      install_element (CONFIG_NODE, &banner_motd_default_cmd);
+      install_element (CONFIG_NODE, &no_banner_motd_cmd);
+      install_element (CONFIG_NODE, &service_terminal_length_cmd);
+      install_element (CONFIG_NODE, &no_service_terminal_length_cmd);
+    }
+
+  srand(time(NULL));
+}